This reverts commit d1aee56d.

Reason for revert: Trace event is causing telemetry regressions
(crbug.com/1094957).
I got a few days of traces and didn't really find what I was looking for, so I'll find another way to investigate.

Original change's description:
> [Jank]: Add uri trace events
> 
> To investigate jank found in UMA sampling profiler.
> 
> Bug: chromium:1081433
> Change-Id: I457731380505af5a4d7a0c30d01b4049ffd2b436
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2242037
> Commit-Queue: Etienne Pierre-Doray <etiennep@chromium.org>
> Reviewed-by: Leszek Swirski <leszeks@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#68326}

TBR=leszeks@chromium.org,etiennep@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: chromium:1081433, chromium:1094957
Change-Id: I6c9573e9a77a54255c5fadc3cec14d437fd62b45
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2279135
Auto-Submit: Etienne Pierre-Doray <etiennep@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Etienne Pierre-Doray <etiennep@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68949}